antenna matching
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Antennas : 15M- Build a Lightweight 15m Yagi Antenna: Simple Design for Impressive Performance
new
- In this article, Steve G0UIH presents a straightforward guide for constructing a lightweight 15m 3 Element Yagi antenna with impressive performance metrics. With a focus on ease of construction and efficiency, the design boasts a nearly 8.2dbi forward gain and 30db front to back ratio. Utilizing readily available materials and a hairpin match for impedance matching, this Yagi offers broad bandwidth and simple tuning for optimal operation across the 15m band.
[ Hits: 53 | Votes: 0 | Rating: 0 ]
- Antenna too short! Inductivity matching with coil match.
- Wire antenna calculator with inductivity matching coil where length shorter lambda/4
[ Hits: 132 | Votes: 0 | Rating: 0 ]
- Extended Double Zepp NVIS Antenna Calculator
updated
- Extended Double Zepp measurements for all ham bands, and online calculator. The antenna is constructed much like an ordinary Dipole antenna but with 5/8 Wavelength Elements matched with an added Impedance Matching Section of balanced feed line
[ Hits: 123 | Votes: 3 | Rating: 7 ]
- Portable Base Matching Unit for 42 to 48 Foot Verticals
- Medium power BMU (Base Matching Unit) intended for 42 foot to 48 foot vertical, sloper, or Inverted-L antennas.
[ Hits: 83 | Votes: 1 | Rating: 1 ]
- Matching transformers for Beverage
- Building some proper matching transformer for loop on ground and Beverage antennas
[ Hits: 74 | Votes: 0 | Rating: 0 ]
- 1:49 unun for end fed half wave antennas
- 1:49 UNUN using two stacked FT240-43 cores for end fed halfwave antenna. To match the end fed half wave antenna to the coaxial feeder, it is necessary to have a matching network or transmission line transformer.
[ Hits: 386 | Votes: 10 | Rating: 8.1 ]
- Outdoor 80m/40m bands Magnetic loop antenna
- No matching adjustments needed. Directly perfect match to 50 Ohms using a remotely switched wideband transformer
[ Hits: 225 | Votes: 0 | Rating: 0 ]
- Angle of OCF L-Dipole Antennas
- This page is a discussion about impedance matching by Off Center Fed dipoles in the Wide L-form. When a vertical or horizontal dipole is bent into a 90 degree L-form, the impedance drops about half.
[ Hits: 75 | Votes: 0 | Rating: 0 ]
- Portable Half-Square Antenna:
- The author explores a portable version of the half-square antenna, typically a single-band structure. Using a 9:1 unun for versatility, they describe construction with speaker wire, deployment using collapsible poles, and field tests, achieving successful contacts on multiple bands. The article suggests efficient matching methods and concludes with the antenna's integration into the author's portable options.
[ Hits: 120 | Votes: 0 | Rating: 0 ]
- Stacking, Phasing and Matching Yagi Antennas
- This is a synopsis of a talk presented to the Sydney VHF DX GROUP by VK2ZAB on how, when and why is convenient to build a Yagi antenna stack.
[ Hits: 239 | Votes: 2 | Rating: 10 ]
- The Smith Chart
- This tutorial introduces and explains Smith Charts, and then gives an introduction to impedance matching. Smith Chart is a tool to visualize the impedance of a transmission line and antenna system as a function of frequency.
[ Hits: 113 | Votes: 2 | Rating: 9.5 ]
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